18 - The harvest of Cush will vanish; they will bring tribute to Yahweh
19 - Egypt will have infighting; economy on the Nile will dry up
19 - Egypt will turn to Yahweh, and fear Israel, and Assyria will go, too
20 - God: Isaiah naked 3 years: Egypt to be exiled thus by Assyria
21 - Babylon and Arabia will both fall
22 - Jerusalem will be sacked by Elam; efforts to defend, deny or escape it will fail. Leadership will change - the key of David will go to Eliakim.